Shortcut to multiply any number from 60-69 by 5

In the previous post we learnt how to multiply any number from 50 to 59 by 5 in seconds.Today we are going to learn another amazing trick to multiply any number from 60 to 69 by 5 in seconds.

Let us see the steps

Step 1: Assume the base as 60

Step 2: Multiply the base by 5

Step 3:Multiply the unit place digit by 5

Step 4:Add the results obtained in step 2 and step 3 to get
final answer.

Now lets consider a few examples to understand better

Example 1:62 x 5 = ?

Step 1:We assume the base as 60.

Step 2:Multiplying the base by 5
We get 60 x 5 = 300

Step 3:Multiplying the unit place digit by 5
We get 2 x 5 =10

Step 4:Adding results obtained in step 2 and step 3
We get 300 + 10 = 310

Ans 62 x 5 =310

Example 2:67 x 5 = ?

Step 1:We assume the base as 60.

Step 2:Multiplying the base by 5
We get 60 x 5 = 300

Step 3:Multiplying the unit place digit by 5
We get 7 x 5 = 35

Step 4:Adding results obtained in step 2 and step 3
We get 300 + 35 = 335

Ans 67 x 5 =335